Explanation: Indian Railways is a vast network that is divided into 17 zones, each with its own headquarters and jurisdiction. These zones are administrative divisions that manage the railway operations within their respective areas. The zones are not ranked by the length of railway tracks, but rather by the area they cover and the number of railway lines they manage.
The Western Railway zone, headquartered in Mumbai, is one of the 17 zones but is not the largest in terms of track length. The Northern Railway zone, headquartered in New Delhi, is the largest zone in terms of track length. It covers a vast area and has the most extensive network of railway tracks, making it the largest zone in the Indian Railways network.
The Metro Railway in Kolkata, often referred to as the Kolkata Metro, is a rapid transit system that operates within the city of Kolkata. It is not considered a railway zone but is a separate entity within the Indian Railways network. The Kolkata Metro was established in 1984 and is the first metro system in India. It operates independently of the railway zones and is managed by the Kolkata Metro Rail Corporation Limited.
The latest addition to the railway zones is the South Western Railway, which was formed in 2003. It was carved out of the Southern Railway zone and covers parts of Karnataka and Goa. This zone was created to improve the efficiency and management of railway operations in the region.
In summary, the Western Railway zone is not the largest in terms of track length, and the Metro Railway in Kolkata is not a railway zone. Therefore, the correct answer is that neither statement is correct. Understanding the administrative structure of Indian Railways and the specific roles of each zone and entity is crucial for comprehending the organization and operations of the Indian Railways network.